#13900: Core lint in BuildFlavour=perf-llvm -------------------------------------+------------------------------------- Reporter: bgamari | Owner: bgamari Type: bug | Status: new Priority: highest | Milestone: 8.6.1 Component: Compiler | Version: 8.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): Simon thinks it's most likely that we have trouble with `case` of `join`: {{{#!hs case (join j x= .... in ....) of ... ===> join j x = case ... of ... in case ... of ... }}} This goes wrong if `j` has a `RULE` attached. We either need to apply the transformation in the `RULE` one way or another (Simon thinks he remembers there being a reason not to) or drop the `RULE`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13900#comment:13 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler